Note: Descriptions are shown in the official language in which they were submitted.
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DESCRIPTION
TRAIN CONTROL SYSTEM
TECHNICAL FIELD
[0001]
The present invention relates to a train control system, and more
specifically,
relates to a train control system of detecting a train location by using radio
distance
measurement and controlling the train.
BACKGROUND ART
[0002]
Conventionally, in a train control system using a so-called radio distance
measurement system, a vehicle radio set is mounted on a train, a wireless
network is
formed between the vehicle radio set and a plurality of wayside radio sets
which is
spatially separated and disposed along a wayside of a track on which the train
travels,
and then, wireless propagation delay (time) between an on-board antennal of
the
vehicle radio set and a wayside antenna of the wayside radio set is measured,
to detect
a train location, so that train control is performed on the basis of the
detected train
location.
[0003]
As a train control system using such a radio distance measurement system,
conventionally, for example, a technique including: wireless train location
detecting unit
that detects a train location on a predetermined track on the basis of a
propagation time
of a radio wave between a vehicle radio set mounted on a train traveling on
the
predetermined track and a ground radio set disposed at a predetermined
location on
the ground; a travel distance calculating unit that calculates a travel
distance of the train
on the predetermined tack on the basis of an output signal of a tachometer
generator
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connected to an axle of the train; a temporary reference location setting unit
that sets
the train location detected by the wireless train location detecting unit as a
predetermined temporary reference location; and train location detection
calculating unit
that detects a train location on the predetermined track on the basis of the
temporary
reference location set by the temporary reference location setting unit and on
the basis
of the travel distance calculated by the travel distance calculating unit, has
been
disclosed (refer to, for example, Patent Document 1).
CITATION LIST
PATENT DOCUMENT
[0004]
Patent Document 1: Japanese Laid-open (Kokai) Patent Application Publication
No.
2007-331629
SUMMARY OF THE INVENTION
PROBLEMS TO BE SOLVED BY THE INVENTION
[0005]
In so-called moving block control as described in the conventional technique,
a
control with shortened operation intervals can be performed by detecting the
distance to
a preceding train, however, for example, in a station yard, it is necessary to
switch a
turnout according to a track on which a train arrives at a station. Therefore,
even in the
case in which the railroad tracks on which a preceding train and a following
train arrive
at the station are different, when the route of the preceding train is locked
by an
interlocking device, the following train cannot move to the route of itself.
After the
preceding train passes through the turnout, the lock of the turnout is
released, and then,
the turnout is switched and locked, and thereafter, the traveling of the
following train is
allowed. Therefore, there is a problem such that the following train has to
temporarily
2
stop and wait until switching of the turnout is completed.
[0006]
The present invention has been made in consideration of the abovementioned
problem, and an object of the present invention is to provide a train control
system capable
of making a following train travel without stopping it even in the case in
which train entering
tracks of a preceding train and the following train are different.
MEANS FOR SOLVING THE PROBLEMS
[0007]
In order to achieve the abovementioned object of the present invention, a
train control
system according to an aspect of the present invention comprises an on-board
device that is
mounted on a train traveling on a track; a vehicle radio set that transmits
and receives
information of the on-board device; wayside radio sets each of which is
disposed at a
predetermined location on the ground to transmit information to and receive
information from
the vehicle radio set; a ground device that is connected to the wayside radio
sets; an
operation controlling device that transmits operation information of the train
to the ground
device; and a turnout for switching tracks, wherein an approach point is set
in a
predetermined location before the turnout on the track, wherein the ground
device is
configured to detect a train location based on wireless propagation time
between the vehicle
radio set and the wayside radio set and control an interval between a
preceding train and a
following train through moving block control, wherein the ground device is
configured to be
able to transmit information to and receive information from the wayside radio
set located
before the approach point, wherein the ground device receives train entering
track
information from the operation controlling device, and adjusts a traveling
speed of the
following train when the following train enters a track which differs from
that the preceding
train entered.
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The ground device detects a train location on the basis of wireless
propagation time
between the vehicle radio set and the wayside radio set, receives train
entering track
information from the operation controlling device, and controls an interval
between a
preceding train and a following train.
[0008]
According to an another aspect, the ground device determines whether or not
the
following train enters a track which differs from that of the preceding train
on the basis of the
train entering track information transmitted from the operation controlling
device, in the case
in which the train entering tracks are different, calculates traveling speed
at which the
following train can travel without stopping until the switching operation of
the turnout is
completed after the preceding train passes through the turnout, and transmits
the calculated
traveling speed to the on-board device.
[0009]
According to an another aspect, an approach point is set in a predetermined
location before the turnout on the track,
the ground device determines whether or not the following train enters a track
which
differs from that of the preceding train on the basis of the train entering
track information
transmitted from the operation controlling device, in the case in which the
train entering
tracks are different, the ground device calculates traveling speed of the
following train in
accordance with the condition that "time until the preceding train passes
through a detector
locking section" equals to "time until the following train reaches the
approach point", and
transmits the calculated traveling speed to the on-board device.
[0010]
According to an another aspect, the train entering track is a track on which a
train
arrives at a station.
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EFFECT OF THE INVENTION
[0011]
In the invention according to an embodiment, the train entering track
information is
received by the ground device from the operation controlling device, and the
interval
between a preceding train and a following train is controlled. Therefore, even
in the case in
which the train entering track of the preceding train and that of the
following train are different,
the following train can be made travel at a proper interval.
[0012]
In the invention according to an embodiment, the ground device determines
whether or not the following train enters a track which differs from that of
the preceding train
on the basis of the train entering track information transmitted from the
operation controlling
device, in the case in which the train entering tracks thereof are different,
calculates traveling
speed at which the following train can travel without stopping until the
switching operation of
the turnout is completed after the preceding train passes through the turnout,
and controls
the travel of the train at the calculated traveling speed. Therefore, even in
the case in which
the train entering track of the preceding train and that of the following
train are different, the
following train can be made travel without stopping.
[0013]
In the invention according to an embodiment, the ground device determines
whether or not the following train enters a track which differs from that of
the preceding train
on the basis of the train entering track information transmitted from the
operation controlling
device, in the case in which the train entering tracks thereof are different,
calculates traveling
speed of the following train so that time until the following train reaches
the approach point
equals to time until the preceding train passes through a detector locking
section, and
controls the speed of the following train on the basis of the calculated
traveling speed.
Therefore, even in the case in which the train entering track of the preceding
train and that of
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the following train are different, the following train can be made travel
without stopping.
[0014]
In the invention according to an embodiment, the train entering track is a
track on
which a train arrives at a station. Therefore, even in the case in which the
train entering
track of a preceding train and that of a following train are different in a
station yard, the
following train can be made travel without stopping.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015]
FIG. 1 is a schematic configuration view illustrating a train part in an
embodiment of
a train control system according to the present invention.
FIG. 2 is a schematic configuration view illustrating the embodiment of the
train
control system according to the present invention.
FIG. 3 is a flowchart illustrating the operation in the embodiment of the
train control
system according to the present invention.
MODE FOR CARRYING OUT THE INVENTION
[0016]
Hereinbelow, an embodiment of the present invention will be described with
reference to the accompanying drawings.
[0017]
FIG. 1 is a schematic configuration view illustrating an embodiment of a train
control
system according to the present invention. In the embodiment, an on-board
device 3 is
mounted on a train 2 traveling on a predetermined track 1. The on-board device
3 has an
arithmetic processor (not illustrated) constructed mainly by a CPU and is
configured to
perform various controls such as a speed control and a braking control of the
train 2.
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[0018]
On the train 2, a vehicle radio set 4 connected to the on-board device 3 is
also
mounted. A plurality of wayside radio sets 5 that transmits information to and
receives
information from the vehicle radio set 4, are disposed along a wayside of the
track 1 of
the train 2. Information is transmitted and received between the wayside radio
sets 5
and the vehicle radio set 4 in the traveling train 2.
[0019]
FIG. 2 illustrates an example of the track 1 to which the train control system
of
the present invention is applied. The track 1 on which the train 2 travels is
branched to
divergent tracks 1 by a turnout 6. In the embodiment, a station 7 is located
ahead of
the divergent tracks 1, and first and second tracks are provided at the
station 7 on the
tracks 1 as approach paths. A predetermined range around the turnout 6 is a
detector
locking section, when the train 2 passes through the turnout 6, which prevents
entry of
another train 2. Before the detector locking section, an approach point as a
stop target
of the following train 2 is set. The location of the approach point is set so
that the
switching operation and locking of the turnout 6 are completed while the train
2 travels
from the approach point to a point just before the detector locking section.
[0020]
A ground device 8 is connected to each of the wayside radio sets 5. The
ground device 8 is provided with a moving blocking device 9 and a train
detecting
device 10. To the train detecting device 10, an interlocking device 11 which
controls
the operation of the turnout 6 for switching the track 1 is connected. To the
moving
blocking device 9, an operation controlling device 12 which performs operation
control
on railroads of the train 2 is connected.
[0021]
The operation controlling device 12 transmits number information and train
schedule information of the train 2 to each of the ground devices 8, and the
train
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detecting device 10 in each of the ground devices 8 calculates distance
between the
wayside radio set 5 and the train 2 by measuring communication time at the
time of
performing communication between the wayside radio set 5 and the vehicle radio
set 4,
and detects the location of the train 2. The moving blocking device 9
transmits
information of a limiting speed and a possible travel distance based on the
location
information of the train 2 from the train detecting device 10 to each of the
trains 2 via the
wayside radio set 5 and the vehicle radio set 4, and the on-board device 3
generates a
speed pattern in accordance with the braking performance of the train 2 on
which the
on-board device 3 mounted, and performs speed control on the basis of the
speed
pattern.
[0022]
The moving blocking device 9 receives information of the train entering track
from the operation controlling device 12, determines whether or not the
following train 2
enters a track which differs from the track on which the preceding train 2
enters. When
the track on which the following train 2 enters differs from the track on
which the
preceding train 2 enters, the moving blocking device 9 calculates traveling
speed of the
following train 2 so as to satisfy the following condition.
"time until the preceding train passes through the detector locking section"
equals to
"time until the following train reaches the approach point"
The calculated traveling speed is transmitted to the on-board device 3.
[0023]
The following train 2 travels in a state in which traveling speed is
controlled on
the basis of the traveling speed received by the on-board device 3. When the
preceding train 2 passes through the detector locking section and enters a
predetermined track, the turnout 6 is switched to the track on which the
following train 2
enters and locked by the interlocking device 11. After the detector lock based
on the
preceding train 2 is released, the stop target of the following train 2 is
reset to the
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normal position.
[0024]
Next, a control operation according to the present embodiment will be
described.
[0025]
First, the wayside radio set 5 and the vehicle radio set 4 communicate with
each other. Then, by measuring communication time thereof, each of the ground
devices 8 calculates distances between the wayside radio set 5 and the train
2, to
detect locations of the train 2 at that time (ST1).
[0026]
The ground device 8 transmits information, such as speed limit and a possible
travel distance, obtained based on the location information of the train 2,
via the
wayside radio sets 5 and the vehicle radio set 4, and the on-board device 3
generates a
speed pattern in accordance with braking performance of the train 2 on which
the on-
board device 3 is mounted, and performs travel control of the train 2 in
accordance with
the speed pattern (ST2).
[0027]
When the moving blocking device 9 receives information of the train entering
track from the operation controlling device 12 and the preceding train 2
passes through
the approach point, the turnout 6 is switched according to the train entering
track
information of the preceding train 2 to be locked.
[0028]
After that, in the case in which the following train 2 approaches the station
7
(ST3), the moving blocking device 9 obtains the train entering track
information from the
operation controlling device 12 (ST4), and determines whether or not the
following train
2 enters a track which differs from the track on which the preceding train 2
enters (ST5).
In the case in which the track on which the following train 2 enters is
different from the
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track on which the preceding train 2 enters (YES in ST5), the traveling speed
of the
following train 2 is calculated so that the time until the preceding train 2
passes through
the detector locking section and the time until the following train 2 reaches
the approach
point become the same (ST6). The calculated traveling speed is transmitted to
the on-
board device 3.
[0029]
The following train 2 travels in a state in which the traveling speed is
controlled
on the basis of the traveling speed received by the on-board device 3 (ST7).
After the
preceding train 2 passes through the detector locking section, the turnout 6
is switched
to the track on which the following train 2 enters and locked by the
interlocking device
11. When the detector lock based on the preceding train 2 is released, the
stop target
of the following train 2 is reset to the normal position. Therefore, the
following train 2
can enter the second track.
[0030]
As described above, in the embodiment, when the following train 2 approaches
the station 7, the moving blocking device 9 receives the information of the
train entering
track from the operation controlling device 12. In the case in which the
following train 2
enters a track which differs from the track of the preceding train 2, the
traveling speed of
the following train 2 is calculated so that the time until the preceding train
2 passes
through the detector locking section and the time until the following train 2
reaches the
approach point become the same. The speed of the following train 2 is
controlled on
the basis of the calculated traveling speed. Consequently, even in the case in
which
the tracks of the preceding train 2 and the following train 2 are different,
without
stopping the following train 2, the following train 2 can be made travel.
[0031]
The present invention is not limited to the present embodiment, and various
modifications can be made without departing from the scope of the present
invention.
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REFERENCE SIGNS LIST
[0032]
1 track
2 train
3 on-board device
4 vehicle radio set
wayside radio set
6 turnout
7 station
8 ground device
9 moving blocking device
train detecting device
11 interlocking device
12 operation controlling device
11
